I have to wean by Wednesday.

Due to a new medication I am being put on to jump start my cycle (due to issues with PCOS instead of doing surgery) I am going to need to wean my Feb LO by Wednesday. I have been BFing this whole time aside from a cup here and there with water and the two formula bottles I gave her when she refused my milk. I am sad about having to end BFing sooner than planned as I was hoping to make it to 24 months but this medical issue needs resolved ASAP. So I need tips on weaning fast to formula since her pediatrician does not want her to go on cows milk at all before her 1st bday Feb 6th. I was not planning on weaning to ever need to be fast tracked nor was I planning to be the one to wean her (I was going to let her do it herself when she wanted to *was hoping for right around the 24 months)